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Journal of Porous Media

ISSN for PRINT: 1091-028X

Institutional price:	$713.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2006, Volume9

104 pages

Issue price - $155.00

Immobilization of ¹³⁷Cs and ⁶⁰Co in a Concrete Matrix. Part Two: Mathematical Modeling of Transport Phenomena

Ilija Plecas
VINCA Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro

Slavko Dimovic
VINCA Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro

ABSTRACT

Our previous work has evaluated the leaching of ¹³⁷Cs and ⁶⁰Co from a waste composite into a surrounding fluid and the determination of retardation factors, K_F, and coefficients of distribution, kd, using a simplified mathematical model for analyzing the migration of radionuclides. In our experiment, we have analyzed the mechanism of ¹³⁷Cs and ⁶⁰Co leaching values during a period of 60 days. Particularly, we have investigated here the latter modified scenario. Transport phenomena involved in the leaching of a radioactive material from a cement composite matrix are investigated using an empirical method employing a polynomial equation. Results presented in this paper are examples of results obtained in a 25-year mortar and concrete testing project, which will influence the design of the engineered trenches system for a future central Serbian radioactive waste storage center.